1) a horn
1a) of animals
1b) since animals (especially bulls) defend themselves with their horns, the horn with the Hebrews (and other nations) is a symbol of strength and courage, and used as such in a variety of phrases
1b1) a mighty and valiant helper, the author of deliverance, of the Messiah
1c) a projecting extremity in a shape like a horn, a point, apex: as of an altar
Part of Speech: noun neuter
Citing in TDNT: 3:669, 428
From a primary word κάρ kar (the hair of the head); a horn (literally or figuratively): - horn.
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root κέρας; click on the second column to search for that grammatical form of the root κέρας; click on the third column to search for that word and grammatical form; click on the total to search for the root κέρας.